Persistent memory for AI

Your AI should
remember you.

Penfield gives any AI assistant long-term memory. Your conversations build on each other. Your preferences stick. Your AI grows with you instead of starting over.

Start Free Trial → Free trial included · Plans from $10/mo

Why Penfield

Everything your AI forgets,
Penfield remembers.

No more repeating yourself. No more lost context. Just an AI that actually knows you.

It remembers everything

Past conversations, your preferences, key decisions. Your AI picks up right where you left off, every single time.

It connects the dots

Memories link into a knowledge graph automatically. Your AI spots patterns and relationships across everything you've discussed.

It works with any AI

Claude Code, ChatGPT, Cursor, Windsurf, Perplexity, Manus, and more. One memory layer across all your AI assistants.

Your data stays yours

Full data sovereignty. Export or delete anytime. Your memories belong to you, not us. We never sell or share your data.

Get started

Up and running in under a minute.

Sign up

Create your account and get your connection details. Takes 30 seconds.

Connect

Add Penfield to your AI assistant with a simple MCP configuration. Works in seconds.

Remember

Your AI starts building memory from the very first conversation. It only gets smarter.

Pricing

Simple, transparent pricing.

Start free. Upgrade when you're ready.

Standard

Early Adopter — 50% Off

$20$10/mo

5,000 memories
25 documents
Vector + hybrid search
Knowledge graph
Personality system
API access
Email support

Start Free Trial

Premium

Early Adopter — 50% Off

$40$20/mo

20,000 memories
100 documents
Vector + hybrid search
Knowledge graph
Personality system
Priority support
API access

Start Free Trial

For developers

Built on open standards.

Production-grade memory infrastructure for AI. Built for developers who ship.

Protocol

MCP Native

First-class Model Context Protocol integration. Works with any MCP-compatible AI client out of the box.

Vector + BM25 Hybrid

Best-in-class retrieval combining semantic understanding with keyword precision. Finds exactly what your AI needs.

Graph

Knowledge Graph

Typed relationships with traversable connections. Memories aren't just stored, they're understood in context.

Storage

Document Processing

Upload PDFs and documents. Automatically chunked, embedded, and searchable alongside conversation memories.

Identity

Personality System

Configurable AI personas with voice, style, and behavioral customization. Build AI that sounds like you want it to.

API

Full REST API

Programmatic access to every feature. Build custom integrations, workflows, and applications on top of Penfield.

FAQ

Common questions.

Penfield is a memory service for AI assistants. It lets your AI remember conversations, preferences, and documents across sessions, so every conversation builds on the last instead of starting from scratch.

Penfield connects to your AI assistant through MCP (Model Context Protocol). Once connected, your AI can store and recall memories, build a knowledge graph of connected ideas, and search across everything you've discussed.

Any AI that supports MCP, including Claude Code, ChatGPT, Cursor, Windsurf, Perplexity, Manus, LM Studio, and more. If your AI speaks MCP, it works with Penfield.

Yes. Every plan includes a free trial period so you can try Penfield before committing.

Plans start at $10/month with early adopter pricing (50% off the regular price). Premium is $20/month with higher limits. All plans include full access to memory, knowledge graphs, document storage, and the personality system.

Your data is stored securely with full data sovereignty. You can export or delete everything at any time. We never sell or share your data with third parties.